#! /bin/bash

#  This script is free software; you can redistribute it and/or modify
#  it under the terms of the GNU General Public License version 2 as
#  published by the Free Software Foundation.
#
#  See the COPYING and AUTHORS files for more details.

# Read in library functions
if [ "$(type -t patch_file_name)" != function ]
then
	if ! [ -r $CMDPATH/scripts/patchfns ]
	then
		echo "Cannot read library $CMDPATH/scripts/patchfns" >&2
		exit 1
	fi
	. $CMDPATH/scripts/patchfns
fi

usage()
{
	printf $"Usage: quilt delete [patch | -n]\n"
	if [ x$1 = x-h ]
	then
		printf $"
Remove the specified or topmost patch from the series file.  If the
patch is applied, quilt will attempt to remove it first. (Only the
topmost patch can be removed right now.)

-n	Delete the next patch after topmost, rather than the specified
	or topmost patch.
"

		exit 0
	else
		exit 1
	fi
}

options=`getopt -o nh -- "$@"`

if [ $? -ne 0 ]
then
	usage
fi

eval set -- "$options"

while true
do
	case "$1" in
	-n)
		opt_next=1
		shift ;;
	-h)
		usage -h ;;
	--)
		shift
		break ;;
	esac
done

if [ $# -gt 1 -o \( -n "$opt_next" -a $# -gt 0 \) ]
then
	usage
fi

patch="$1"
if [ -z "$patch" ]
then
	patch="$(top_patch)"
	if [ -z "$opt_next" ]
	then
		if [ -z "$patch" ]
		then
			printf $"No patches applied\n" >&2
			exit 1
		fi
	else
		if [ -z "$patch" ]
		then
			patch="$(cat_series | head -n 1)"
		else
			patch="$(patches_after "$patch" | head -n 1)"
		fi
		if [ -z "$patch" ]
		then
			printf $"No next patch\n" >&2
			exit 1
		fi
	fi
else
	save_patch=$patch
	if ! patch=$(find_patch $patch)
	then
		patch=$save_patch
		printf $"Patch %s is not in series\n" "$patch" >&2
		exit 1
	fi
fi
if is_applied $patch
then
	if [ "$patch" != "$(top_patch)" ] || \
	   ! $CMDPATH/pop -fq "$patch"
	then
		printf $"Patch %s is currently applied\n" \
		       "$(print_patch $patch)" >&2
		exit 1
	fi
fi
if remove_from_series "$patch"
then
	printf $"Removed patch %s\n" "$(print_patch "$patch")"
else
	printf $"Failed to remove patch %s\n" "$(print_patch "$patch")" >&2
fi
### Local Variables:
### mode: shell-script
### End:
# vim:filetype=sh
